142 Rev. T. A. Marshall's monufiraph of 



(13) 12. Mesothorax punctured ; clypeus tri- 



denticulate . . . . . . . . 5. rufidens, Wesm. 



(12) 13. Mesothorax reticulato-rugose ; clypeus 



obtusangular .. .. .. ..6. Eatzeburgii, n.s. 



(1) 14. Trochanters black. 



(18) 15. Mesothorax punctured. 



(17) 16. Clypeus rounded 7. variipes, y^esm. 



(16) 17. Clypeus bidenticulate . . . . . . 8. Mcarinatus, Schaflf. 



(15) 18. Mesothorax reticulato-rugose. 

 (20) 19. Front imi)ressed with a distinct mar- 

 gined fovea . . . . . . . . 9. armatus, Wesm. 



(19) 20. front with an obsolete fovea, which is 



not margined . . . . . . . . 10. 4-dentatus, Wesm. 



1. Ascogaster instahilis, Wesm. (PL V., fig. 2). 



Ascogaster instahilis, Wesm., Nouv. Mem. Ac. Brux., 

 'l835, p. 227; Eeinh., Berl. ent. Zeit., 1867, 

 p. 364 ; Thorns., Opusc. Ent., vi., 1874, p. 582, 



TV O 



A. Esenheckii, Cur., B. E., 672, No. 8, <? . 



A. pallida, Euthe, Stett. Zeit., 1855, p. 293. 



Clielonus femoralis and riifiventris, Schafl"., F. G., cliv. 



Black ; antennae at the base, thorax, abdomen, and legs, more or 

 less rufo-testaceous ; trochanters rufo-testaceous. Head very finely 

 punctulato-rugulose ; clypeus discrete, depressed, unidentate, the 

 apical margin truncate. Mesothorax and pleurae punctulate, the 

 latter impressed with a rugose fovea. Metathorax reticulato-rugose, 

 truncate, hardly bidentate. <? J. Length, li — 2;^, wings, 3 — 4ilin. 



Palpi black. In the 3' the base of the abdomen is more or less 

 rufo-testaceous ; the fore femora at the apex, and all the tibiae, 

 visually of the same colour; the middle or hind tibiae, or both, 

 blackish at the apex. Antennae longer than the body, 32 — 39- 

 jointed. Abdomen with two short basal parallel carinae, sometimes 

 obsolete. Wings slightly infuscated, with a whitish streak under 

 the stigma, which in large specimens has a pale dot at the base ; 

 cubital and anal nervures distinct ; recurrent nervure interstitial. 

 Antennae $ 85-jointed (in one specimen), as long as the body, the 

 basal half usually testaceous, as are also the thorax more or less, 

 the abdomen at the base or entu-ely, and the legs ; the posterior 

 femora, and hind tibite at the apex, commonly fuscous. The 

 largest British species, distinguished by its truncate clypeus, long 

 antennae, and conspicuously testaceous abdomen ; that of the $ , 

 however, is often wholly black. 



Described from two females and four males. Not un- 

 common ; Leicestershire, Devonshire, Yorkshire, Essex, 

 &c. Glauville's Wootton, taken by Dale (Curtis). 



